Clutch band



Feb. 3, 1942. L. C. HOLLAND' CLUTCH BAND Filed Feb. 25, 1941 2Sheets-Sheet l In ventor owe/7C 7o/en( Attorney CLUTCH BAND Filed Feb.25, 1941 2 Sheets-Sheet 2 ,1- Inventar 6i f9.6. dwe/v/ a Afd/mf Attorney Along life, and economy ininanufacturek Patented Feb. '3; 1942 n.Y y i CLUTCHIBAND 1v i Y y i. VApplicationFlinayzs,1941;serin1Nafssojssejf'r f gelatin-491.1924101) n i Myinvention relates tor-imprqvmentsfin 'iutcn cnupung biockf's'extenqing'jpeynd said fendfrerf bands for frictionally grippinga"rot`ating or'ai a suitable distance andi'providedwith a lateralinon-rotatingmachine element toclutch the'saine." front end` bore therbypmeans/lof which 'the` The invention is directedtoward providing af'fn bandmaybefpivoted on'a pingnotjshowng forx simply constructed band ofthis character part"" l` v: anchoring or attaching the same in `positionuponf ularly designed for gradual and -unifornr g'rip-y K themac'hinepartto.whichhitistojbeCOIleCtQdj ping action, quick and easy replacementrtsp The buter side'rof the* block-`8i is bevelled to the l A y ysectinZ fora purpose presently seen.- Similarly"A -Other andsubordinatey objects are 'alscompie-I fittedoni the free of theksho'e 5ofthe longerf hended byy my invention, all of which?ytgetherfl'sectiornI isa similar coupling block IUvbut'having with theprecise nature of my imp'rov'ernfntfwilll an end eye`bolt' II fr theconnection theretooffA be readily understood Awhen'th'e 's'uccveeding'dea suitable operating v'mechanism3not shown," yforjA y scription andclaims areread with Ireferenceto tightening saidband "aroundfthe machr'lP31110 the drawingsv accompanying and'forming y'partYbe-clutched(1"Ifhefcoupling*block* 8.-l detached n this specification.'K f *f f 'i from the 'shoesfwhra's the couplingl block I0 is.'` I nsaiddrawings: y f `l attached toits' shoe5 by weldingjnot shownfA Figure 1is a View `in side elevation'l offa pre- The Idescribed sections; I, 2;are connected to-f" ferred form of my invention; f get her byflexibleconnuection comprising a steel' Figure 2 is aview in plan, I 1cable anchored rto-l thecoupling blocks 13,Y `Il l`, 'to'f Figure 3 `isa fragmentaryview in plan of the l20 'provide a pair ofl stretches |72'extending-sidejbyf" attached end of the band ldrawn yto"a`n5'enla1ge`c1side aroundthfbuterfaces offthe shoes* 5; and.L scale and with thekeeper platedetached',I` i parallel vwithith'e'side" edges thereon*v,lor1j-'fhis Figure 4 is a fragmentary face view of the freepurpose'the kcoupling block I Unis proyidedyvitfna'" end 4of the band,Vpair of*longitudinally'extending, 'laterallyisp'alcei Figure 5 isasimilar view with the keeper plate 25 grooves I3 in the outer facethereof and the cable detached, isA looped, as at I-4, to form thestretches I2 and Figure 6 is a fragmentary facev view of the free.. the`latter trained through said grooves I3, said end of the band equippedwith` a modified form stretches extending around said sections I, 2, toof cable, the coupling block k8 to which the yterminal ends Figure 7 isa fragmentary view in side eleva- 30 of the cable are connected asfollows. A pair of vation of said free end of the band furtherillusgrooves I5, similar to grooves I3 are provided in trating themodied form of cable, and the outer face of the coupling blockr 8through lof the sections spaced apart in contiguous yrelation.

Figure 8 is a fragmentary view of the attached which the ends ofthestretches I2 are trained. end of the band equipped with the modifiedform Flat terminal heads I6 are provided on said of cable, and stretchesI2 which seat in notches, orsockets, I1 Figure 9 is a fragmentary viewyin side el'evaprovided in the COllDling block 8` at the Outer ends tionof lthe attached end of the band equipped Y of -said lgrooves I3 and`whereby said stretches withsaid modied form of cable. rareanchored-against'pulling out of. said ygrooves Referring to thevdrawings by numerals, the I5. A nat keeper plate I8 is secured, as byscrews band of my invention, in its preferred embodi- 40 I9 on thecoupling block 8 over the grooves I5, ment, comprises an arcuate sectionI anda relanotches I1 and heads I6, said plate having. a f tivelyshorter,I arcuate section 2 arrangedend to transverse bottom rib -20thereon engaging behind end to formabroken` annulus with inner ends 3the heads I6 to further anchor the same in'position and outer free endsII of the sections spaced Returning nowkto the coupling block I0, a flatfurther apart. 1 keeper plate 2| yis secured by screws 22 to the Eachsection I, A2, comprises an arcuate stripi Outer face of `said blockover the grooves I3 and like shoe 5 of a suitable resilient metalhavingan s tretches I2 to retain the latter in said grooves. internalfacing of any suitable yfriction gripping The bight of the loop y I4 istrained around an material, such as brake lining, attached to the 00arch-shaped anchor block 23 slidably interposed shoe in sections 6spaced longitudinally of the lbetween Athe coupling block I Il landthekeeper shoejthe attaching means preferably comprising plate 2| inadvance of the grooves I'3with shim rivets 'I spaced lalong the sideedges of the shoe. plates 24, interposed between the same and an Fittedon the f ree end of the shoe 5 of the abutment 25 formed on `said block.The purpose shorter section 2, on the outer face thereof, isa of theshim plates will presently appear;

For securing the sections l, 2, to the stretches l2 of the cable,circumferentially spaced apertured cleats 26 are provided on the outerfaces of the sections through which the cable stretches l2 are slidablyextended.

As will now be seen, pull exerted on the eyebolt Il will be transmittedto the cable stretches I2 through the anchor block 23 to tighten thesections I, 2, around the element to be clutched, the stretches I2sliding through the cleats 26 so that pressure is applied to saidsections I, 2, gradually and uniformly. Because of the looping of thecable around the anchor block 23, said cable is free to slide around thesame and thereby equalize the pull on the stretches I2 and pressure onthe sections I, 2, at both sides of the band. The stretch of the cablemay be compensated for by inserting thicker, or additional, shim'vplates between the anchor block 23 and abutment 25. The eye-bolt Il isthreaded into the block Hl for adjustment to tighten the band if desiredin a manner which will be clear.

In the modified form of the invention shown in Figures 6 and 7, acoupling block 21, correspondingto block l0, is provided with theexcep-` tion that the block has a single groove 2-8'therein for theextensionA therethrough of a iat steel cable 29 to be used in lieuof thecable previously described, said cable 29 having a at head end 30fitting in a socket 3l provided in said block` in advance of the groove23,` said groove 28, head 30 and socket 3| beingcovered by a keeperplate 32 attached to the same by screws 33.

In Figures 8 and 9, a coupling block 34 is provided corresponding tocoupling block 8 and which is constructed in the same manner as couplingblock 21 for anchoring the'other head end 35 of the flat steel cable 29thereto, said block 34 being provided with a keeperfplatefS similar toplate 32.

The advantage of the at steel cable 29 is thatit is subject to lessstretch than-the rst described cable.

The foregoing will, vit is believed, sufice'to irn- Vspaced apart, apair of coupling blocks on the outer ends of said shoes, respectively,opposed to the outer faces thereof, and a looped cable connecting saidblocks together, said looped cable extending around said shoes alongeach side edge thereof and terminating in a pair of enlarged end heads,the loop of said cable slidably extending through yone block and beingconned therein, and the lother block having a pair of grooves thereinthrough whichv said ends of the cable are trained, 'said groovesterminating in a pair of sockets seating said heads, and a keeper platesecured to said other block and retaining the ends of the cable andheads in the ygrooves and sockets, respectively.

2. A clutch-band comprising a pair of arcuate strip-like shoes disposedend to end to form a broken annulus with outer ends spaced apart, a pairof coupling blocks on the outer ends of said shoes, respectively,opposed to the outer faces thereof, and-a looped cable connecting saidblocks together said cable extending around said shoes along each sideedge thereof and terminating in ends anchored to one of s'aid blocks,the loop of said cable being slidably extended through the other blockand the latter havingl an abutment thereon, an anchor block fitted inthelooped end of -said cable between the same and vsaid abutment, and shimplates interposed between said block and abutment.

LOWELL C. HOLLAND.

